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Australia
George Fisher Mine (Mount Isa Zinc Operation)

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 Location:
19 km N from Mount Isa, Queensland, Australia

  Address:
Private Mail Bag 6
Mount Isa
Queensland, Australia
4825
Phone  ...  Subscription required
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
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  • Reserves
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  • Filings & News

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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Bench stoping
  • Transverse open stoping
Processing
  • Flotation


Owners

 
CompanyInterestOwnership
Glencore plc. 100 % Indirect
Mount Isa Mines Ltd. 100 % Direct

Deposit Type

  • Breccia pipe / Stockwork


Summary:

George Fisher Mine (previously Hilton mine) is an underground zinc-lead-silver mine. It has two separate mining areas. The older Hilton mine is now known as George Fisher South and the newer mining area is George Fisher North (previously Hilton North).

The George Fisher orebody is an economic sulphide mineralisation. It is distinct from the nearby Mount Isa deposit due to its lack of breccia-hosted copper mineralisation. The deposit is composed of a series of 11 stratiform orebodies striking near N-S and dipping west between 30°-90°.

Lead-zinc-silver mineralisation occurs in galena and sphalerite-rich bedding parallel horizons in dolomitic and variably carbonaceous pyritic shales and siltstones.


Mining Methods

  • Bench stoping
  • Transverse open stoping


Summary:

George Fisher South uses a combination of modified retreat benching and continuous fill benching methods, while George Fisher North uses retreat benching and transverse open stoping. Until 2009 George Fisher Mine relied on traditional pyrotechnic blasting methods.


Crushing and Grinding


Processing

  • Flotation

Source: Subscription required

Summary:

Ore mined is roughly crushed on site, then trucked to the Mount Isa mills for processing. First, the ore is ground into a fine dust via a series of ball mills. This dust is then mixed with water and reagents in our zinc-lead concentrator’s flotation circuit. The reagents help us to separate the valuable mineral content from waste rock. Air is forced through the slurry creating bubbles, which float to the surface and attract and bind to the zinc or lead particles. The glossy, mineral-laden “froth” is then skimmed off the top and dried. What remains once the water content of the froth has evaporated is zinc or lead concentrate. Our zinc concentrates are sold in the domestic market and exported overseas, while our lead concentrate undergoes further processing and smelting on site to become crude lead, or lead bullion.

Lead concentrate is mixed with high grade silica, limestone and copper slag, a by product of our copper smelting operations. These ingredients are known as fluxes ........


Combined production numbers are reported under Mount Isa Zinc Operation

Operational Metrics:

Metrics201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required3.1 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2018:

CategoryTonnage Commodity
Proven 16.5 Mt Zinc
Proven 16.5 Mt Lead
Proven 16.5 Mt Silver
Probable 72.4 Mt Zinc
Probable 72.4 Mt Lead
Probable 72.4 Mt Silver
Proven & Probable 88.7 Mt Zinc
Proven & Probable 88.7 Mt Lead
Proven & Probable 88.7 Mt Silver
Measured 57.1 Mt Zinc
Measured 57.1 Mt Lead
Measured 57.1 Mt Silver
Indicated 166.4 Mt Zinc
Indicated 166.4 Mt Lead
Indicated 166.4 Mt Silver
Measured & Indicated 224 Mt Zinc
Measured & Indicated 224 Mt Lead
Measured & Indicated 224 Mt Silver
Inferred 80 Mt Zinc
Inferred 80 Mt Lead
Inferred 80 Mt Silver


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jan 22, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 22, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 22, 2021
....................... Subscription required ....................... Subscription required Subscription required Jan 22, 2022
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2018
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2017
Year-end Mineral Reserves 2016
Other 2012
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Aerial view:

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